diff --git a/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/grade/GradeDetailsDialog.kt b/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/grade/GradeDetailsDialog.kt
index 80bee3c5..1c6d5c01 100644
--- a/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/grade/GradeDetailsDialog.kt
+++ b/app/src/main/java/pl/szczodrzynski/edziennik/ui/dialogs/grade/GradeDetailsDialog.kt
@@ -3,6 +3,7 @@ package pl.szczodrzynski.edziennik.ui.dialogs.grade
 import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.graphics.ColorUtils
+import androidx.core.view.isVisible
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import kotlinx.coroutines.*
@@ -10,7 +11,9 @@ import pl.szczodrzynski.edziennik.App
 import pl.szczodrzynski.edziennik.R
 import pl.szczodrzynski.edziennik.data.db.full.GradeFull
 import pl.szczodrzynski.edziennik.databinding.DialogGradeDetailsBinding
+import pl.szczodrzynski.edziennik.onClick
 import pl.szczodrzynski.edziennik.setTintColor
+import pl.szczodrzynski.edziennik.ui.dialogs.settings.GradesConfigDialog
 import pl.szczodrzynski.edziennik.ui.modules.grades.GradesAdapter
 import pl.szczodrzynski.edziennik.utils.SimpleDividerItemDecoration
 import kotlin.coroutines.CoroutineContext
@@ -60,6 +63,12 @@ class GradeDetailsDialog(
 
         b.gradeValue = if (grade.weight == 0f || grade.value < 0f) -1f else manager.getGradeValue(grade)
 
+        b.customValueDivider.isVisible = manager.plusValue != null || manager.minusValue != null
+        b.customValueLayout.isVisible = b.customValueDivider.isVisible
+        b.customValueButton.onClick {
+            GradesConfigDialog(activity, reloadOnDismiss = true)
+        }
+
         launch {
             val historyList = withContext(Dispatchers.Default) {
                 app.db.gradeDao().getAllWithParentIdNow(App.profileId, grade.id)
diff --git a/app/src/main/res/layout/dialog_grade_details.xml b/app/src/main/res/layout/dialog_grade_details.xml
index 79365b1b..7a176c02 100644
--- a/app/src/main/res/layout/dialog_grade_details.xml
+++ b/app/src/main/res/layout/dialog_grade_details.xml
@@ -269,10 +269,45 @@
                     android:id="@+id/gradeHistoryList"
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"
-                    tools:listitem="@layout/grades_item_grade" />
+                    tools:listitem="@layout/grades_item_grade"
+                    tools:itemCount="2"/>
 
             </androidx.core.widget.NestedScrollView>
 
+            <View
+                android:id="@+id/customValueDivider"
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginTop="8dp"
+                android:background="@drawable/divider" />
+
+            <LinearLayout
+                android:id="@+id/customValueLayout"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:gravity="center_vertical"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:layout_marginVertical="8dp"
+                    android:layout_marginRight="8dp"
+                    android:layout_marginEnd="8dp"
+                    android:text="@string/grades_stats_custom_value_notice"
+                    android:textAppearance="@style/NavView.TextView.Helper"
+                    android:textSize="12sp"
+                    android:textStyle="italic" />
+
+                <Button
+                    android:id="@+id/customValueButton"
+                    style="@style/Widget.MaterialComponents.Button.OutlinedButton"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:minHeight="0dp"
+                    android:text="@string/configure" />
+            </LinearLayout>
         </LinearLayout>
     </ScrollView>
 </layout>